A particle of mass M is moving in a circle of fixed radius R in such a way that its centripetal acceleration at time t is given by `n^2Rt^2` where n is a constant. The power delivered to the particle by the force acting on it, it :
A
`MnR^2t^2`
B
`MnR^2t`
C
`(1)/(2)Mn^2R^2 t^2`
D
` Mn^2R^2 t`
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